Diphenhydramine? As in benadryl? I used to trip on that stuff but it wasnt like what you said. It would make me really pissed off and my eyes would look like somoene colored them with a red marker. One time I went to school on it and everyone said that I looked like I was about to kill someone.
And there would be a big ball in the center of my vision that would kind of bubble and pop and if i looked at the ground I kept seeing holes that I thought i would fall into. And soemtimes I would hear my phone ring, I would answer it, and have a conversation and then all the sudden realize that I didnt even have a phone in my hand. And I would see things that arent there, especially people, talking to me and then all the sudden disappearing.

Anyway that stuff is bad for you and also dangerous.. seems like you had a good time but it can also give you a hard time just so you know. Be careful and dont do more than 400 mg.